RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

[dcapper]

I showed up to my vacation home first to find my Insignia 26" is dead. Now the RCA RLCDV3282A-B is acting funny. It uses the t.rsc8.10b 12305 main board like the Sceptre. But my problem is a little different than the others. The tv turns on with the remote. I get the RCA splash screen, it shows me the channel but no video from the channel. After a few seconds the tv turns off. But even after it turns off I can turn it back on with the remote no problem. At first it was doing it for the first few times, then after it started doing it more and more. Now it will not stay on. I replaced all the caps but there is no change. I even changed the startup cap. I looked at other threads that have the same main board in Sceptre TV's and they changed the main. Should I buy a new mainboard and pull my eeprom from it?

EDIT: After turning it on and off for about 20 mins, it finally came on. I have no idea what's with this thing. The voltages on the psu are fine.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

Forgot to add a pics.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I had to bump this thread. I have metered everything on the power board and I cannot figure out why the power turns on then off. Once it finally turns on and stays on, it will run until I turn it off again. I'm tempted just to order a new power supply and main board and be done with it.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

Check PSON and BLON, see if it disappears.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I'll take it apart this evening. After 20 attempts of turning it on, it finally came on. It's weird. From all the problems I've seen with Sceptre tv's using the same mainboard, this one is acting different. I can use the remote to turn it on and off. I get the RCA splash screen and I see the channel number on the top right, then it reboots to the same thing then turns off. I turn it on with the remote and it repeats itself. I'm actually wondering if there is a cold solder joint somewhere that after turning it on and off for a while, it heats up enough to work.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

Turn a can of air upside down and freeze the eeprom

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I haven't pulled it apart but I'm thinking it's something in the psu. Today I had it on for 12 hours and never turned it off. I turned it off just before getting ready for bed and I tried to turn it back on immediately and it starting doing the same. So much for heat or cold affecting it.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I metered the psu outputs today. I don't have pson or blon but the equivalent is +5vsb and SB going to the main board. My 12v out is 12.58v. My 5v out is 5.18v. The SB is 4.61v. The +5vsb is 5.18v with the tv on or off. But reading from the psu to the back light board, I think I have some answers. The back light comes on with the splash screen but I don't get solid voltages, then the tv turns off. I tried to read voltages with the back light board connected and not connected. Both give the same readings. My voltages while the tv is on for PB is .08v, VS is 2.23v, CS-IC is .9v and my VBL connection bounces from 100v to 1100v. I'm going to take out the psu and do some metering and resolder some points. I think I have a psu problem and not a main board one. Any ideas?

I need a schematic for the psu. Model AY098P-4HF02.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

What happens to SB when the tv acts up?

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I turn the tv on and it goes 4.61v and stays that way until the tv turns off. I haven't gotten the tv to stay on today.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

So when the TV reboots, the SB disappears? If that's the case that is a clear main board problem. Try disconnecting the backlights and see if the TV stays on without rebooting.
If you want to test the PSU, force it on with 1k resistors.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

No the SB never goes away until the power on the tv is off. The +5vsb stays on 5.18v all the time with the power off or on. The psu has a +5vsb and a SB connection.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

The 5vsb should be always there. I expect the SB to disappear when the TV has been turned off. Question is if the SB briefly disappears from the main board, causing the PSU to turn briefly off. Then SB reappears and the loop begins again. If the SB stays solid on all the time, the whole PSU should stay on too. So measure all voltage rails if they hiccup when the TV reboots.
When SB disappears and PSU shuts down, I expect that.
When SB is on and PSU shuts down something, then there is a PSU fault.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

The SB doesn't move at all. It stays at 4.61v while the tv turns on and reboots until the tv turns completely off. The only thing that hiccups is the back light rail. But even if I unhook the cable to the back light board, it still hiccups on the psu. The power rail coming in from the main board never hiccups. Here is the readings at the back light out on the psu.

PB .08v
VS 2.23v
CS-IC .9v
VBL flucuates all over the place.

Looking like I have a problem with the psu.

I'm trying to get it to turn on and stay on so I can test it while it's working.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

there might be 2 problems on 2 different boards not just one.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I have to agree with you. I finally got the tv to turn on and stay on. The voltages on the psu are reading the exact same way they did when the tv wouldn't stay on. Maybe something isn't engaging on the mainboard? I can get a cheap main board to test. Since I will never find an RCA one, I'll have to get a Sceptre one and swap the eeproms. Sound like a plan?

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

sounds good... whatever mainboard you can find that works in there.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

I have a question. I read on the forums here that I sub a different board in there and swap the eeprom. The one in it is a t.rsc8.10b 12305. I saw the people used a t.rsc8.10a 11153. But looking on ebay I saw a t.rsc8.2a with the exact same pinouts. I wonder if I can install any of these with just swapping the eeprom?

EDIt: Wish I could find an eeprom for it. Doesn't seem to be one. Even if I can find another tv with the same main board that has a dvd built in.

[CapLeaker]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

Well... I think you rather have to be careful, because your board has more connectors than a Sceptre, even so it has the same part number. So you have to match your main board not only with the part number, you also have to make sure all the connectors are on it too. There are some models that have more or less features, so theoretically you could "upgrade or downgrade" that way and it has been done.

[dcapper]

Re: RLCDV3282A-B Turns on then off with t.rsc8.10b 12305 main

The more I read about a faulty eeprom, the more I think it's an eeprom problem. The boards I have been looking at on ebay and shopjimmy have the right amount of connectors, but I have a feeling I'll lose the dvd capabilities of the tv. Which really doesn't matter since I have a blu-ray player hooked to the tv anyways.